l a u n M a
de Experimentos para Preescolar
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Experimentos
para Preescolar
CONSEJO DE CIENCIA Y TECNOLOGÍA DEL ESTADO DE QUERÉTARO CIENCIA Y TECNOLOGÍA PARA NIÑOS
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Participantes Alejandra Carrillo Hernández Beatriz García García Beatriz Eugenia Rodríguez Tovar Carla Teresa Méndez Cuenca Mónica González Madrazo Magali Refugio Balderas Álvarez Ivonne Esparza Martínez María Teresa Jaramillo López Natzlley Kezne Arredondo Alvarado María del Carmen Moreno Olvera Saraí Verónica Juárez Álvarez Sandra Luna Hernández Claudia Aguilar Sánchez Nelly Beltrán Ortiz Sarah Elena Bonilla Alonso Claudia Edith Camargo Torres Esperanza Carbella Andrade Alma Patricia Díaz Jaramillo Yamisette Carvajal Rebolledo Ma. Andrea Herrera Paulín Elisa Ibarra Morales Lizzeth Mata Mora Patricia Olvera López María Wendoly Palacios Rojas Karla E. Pérez González Cecilia Ramírez González Anaíd Monserrath Ramírez Pedraza María José Rodríguez Hernández Ma. Alejandra Sánchez Silva Brenda Suárez Lara Ana Cecilia Tejeda Díaz
E. Mildred Rodríguez Toledo Ciencia y Tecnología para Niños CONCYTEQ
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Índice Presentación Introducción ¿Flota o se hunde? ¿Cuántos años tiene un árbol? La sustancia X Elevador El agua se puede convertir en lente El sonido de la gallina . La fuga de agua ¿Cómo se disuelven las sustancias? La lengua se organiza El globo mágico Nuestra cámara oscura ¿Cómo se forman las nubes? El águila tiene calor Las grasas
Página
1 3 5 6 7 8 10 12 13 15 16 17 19 20
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PRESENTACIÓN
¿Qué encontrarás en este manual? Durante los meses de septiembre y octubre de 2006, se desarrolló en la Centenaria y Benemérita Escuela Normal del Estado de Querétaro “Andrés Balvanera”, el taller “Enseñanza de las Ciencias en Educación Preescolar”. El taller fue dirigido a estudiantes de 5to. Semestre de la Lic. en Educación Preescolar. El presente manual es el resultado del taller y del trabajo de las alumnas, dirigido a profesores y profesoras de educación preescolar. El manual incluye 12 experimentos para niños.
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INTRODUCCIÓN
¿CUÁL ES EL OBJETIVO DE LA ENSEÑANZA DE LA CIENCIA Y TECNOLOGÍA? El propósito de enseñar ciencias es desarrollar la capacidad del niño para entender la naturaleza de su entorno. Los niños y los adultos debemos comprender que lo que se necesita para ser científico lo tenemos potencialmente cada uno de nosotros. El objetivo de enseñar ciencias no es formar gente que vaya a dedicar el resto de su vida a cuestiones científicas, lo cual no es mal propósito, pero la intención principal es formar seres humanos con una visión integral, promoviendo el desarrollo de habilidades de pensamiento científicas en los niños; como el cuestionar y reflexionar sobre los fenómenos naturales que suceden a nuestro alrededor, mediante la investigación de las causas que los generan; esto le permitirá al niño desarrollar una actitud científica y convertirse en un ser reflexivo, crítico y analítico; capaz de seguir un método para realizar investigaciones a partir de la información disponible, formular hipótesis y verificar las mismas mediante la experiencia.
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Manual de Experimentos para Preescolar
¿FLOTA O SE HUNDE? ¿Qué neces necesito? ito? Tres vasos grandes. Un huevo. Agua. Sal. Azúcar. · · · · ·
¿Cómo se hace?
1. C o on n u n n p l l u um ó n n e s sc e s c r sc r i ib c r e r i ib b e e e n b l a e n u n a p n v a al l a a 2 . Ll e a as b b s o r r o l a a a s en a p a a a n a l l a c o y al l a e ab r o n n b n n r a o a a a z t t g r r u u o o 3 . E n a a zú l ú c h a a c a a s p ar s a a r , e n n e l l v a t t l l a a a a b b l n o t a a r r a a m as s o a t r i o c o t t ro g a a o v a u u d d a a o . d n n as s o e e l o a a l o o r e p s s ev a a v u t l l a a r e r ue b b e e l l v r r s s ve a a v e c o e a a s s s s on os o cr c n u n s . r i i t t a na a “ s a c u s a sa al l p o a l l ” uc ha r c ” os a s i i b ñ ñ r a a b a a de d l le y t r e . e u n ra na 4 . E n a t a c u t a a d e uc c ha r n e l l v a e d i i ra so s l l v a d a o d as v a d e s o o c o e e r r e s a l o a a n n al l , m l a a a d e y y el l e l le p o o al l a a r r a c e m e n b b a a n n r r t t a a i i da d nt e s t o a d d e sc o . d c r 5 . C o r i it t a e a “ a ol l o az z ú oc ú c c a ca ar a e l l hu ” r ” , a ñ ña ev e a d e d v o o e n e u n O b bs na n s e a c u e r e r v l l v uc a a v c h a r a a q s s u e u o o ra e a d a 6. C o q e d u u l l a e e h u t ol l o e e i i v v e e o c ca o o n n e e s e a e l l hu e e e d e sc s ep c r p o ri i t o s ev t a s i i t v o a l a q u o e n t a u e a a p a e s u n e n n e u c al l a e l l ce ed l l a b r v e f a a b d o o s s ra e n n o o a a g u . d d e o o n n d 7 . C o e ua e e l l a . l l q v u u a a ol l o e e s s o c c a o o ha s . a e l l hu s d i i s s u e u el l t ev e v t
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Manual de Experimentos para Preescolar
Peso del cuerpo Ø Ø Ø
Ladensidaddellíquido Elvolumendelcuerpoqueseencuentrasumergido Lagravedad
Alañadirsalalagua,conseguimosunlíquidomásdensoqueelaguapura, loqu lo quee ha hace cequ quee el elem empu puje jequ quee su sufr free el elhu huev evoo se seaa ma mayo yorr y su supe pere reel elpe peso so delhuevo:elhuevoflota.
¿Cómo se relaciona con mi vida diaria? Esteexperimentonosmuestrapor quéesmasfácilflotarenaguade marqueenaguaderíosypiscinas. Larespuestaestáenqueelaguade Empuje del agua marporlasalquecontieneesmás densaqueelaguaderíoopiscina,éstamayordensidadprovocaquela fuerzadeempujequeejerceelaguademarsobrenuestrocuerpo seaa ma se mayo yor, r, po porr lo ta tant ntoo el eles esfu fuer erzo zo qu quee re real alic icem emos os po porr pe perm rman anec ecer er flotandoesmenorenelmarqueenunaalbercaconaguadulce.
Recomendaciones para su aplicación en grupo Ø Te Tene nerr lilist stoo y ma marc rcad adoo el elma mate teri rial alpa para raca cada daeq equi uipo po
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Manual de Experimentos para Preescolar
¿CUÁNTOS AÑOS TIENE UN ÁRBOL? ¿Qué necesito? Una rama de árbol (con un grosor mayor a un centímetro). Lija para madera. Agua. Un vaso. ·
Adivina ¿Cuántos años tengo?
· · ·
ns vers a l a r t a m r o ? r bo l en f á s e h a c e n u e d a ¿ C ó m o a r am l a s p ar tes. 1. Cor t a a a i r a v r e n a r am a y p ar a o b te s ex tremos de l a o de lo . 2. Lij a un men te humedéce l loo bser ves. o e r u o i q r s e o t lo l pos o de c írcu r e m ú n l e a 3. Cuen t l loos tiene ? u c r ír í c s o t 4. ¿Cuán
¿Qué significa? Una forma de que los niños asimilen que el mundo vegetal se compone de seres cuya existencia (aparte de asegurar el bienestar de los seres vivos en general) merece respeto es; comprobar que están vivos como ellos y que tienen funciones en común. Una de esas funciones es el crecimiento. Los árboles como todos los seres vivos crecen. En el interior de
e n t o m i e e c i m E l c r o s d e l o
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Manual de Experimentos para Preescolar
a d e l a e d n r e n e p e e d u l m o , b o u n á r o r ej e m p l o e d a o, e l o d p i i d , b v s m e e e l a d u ; e n c a l g e m p o u n o s a b e d s o g u n o s ñ a E l t i e ; a g g s l t o n a ñ e. A i e a r e r 5 0 0 c i e i r e s p ec d e u n o s c u e v i v v e r t o s , d s o e o a l c a b C a n a d á p u s 1. 5 0 0 a ñ y s ec u o y a s 5 o e l o h a o r a d o e l a rc e d lc a n z a b a n 0 0 a ñ o s y e l c o l o 0 2. 0 e s a n o d n i d n i a p o s, e s n l d r o b l e a E g . e e s U l l l o s ñ o s 0 0 0 a d e E s t a d o e c o n oc e n e n e b r s d e 4. 0 v o t a : s d. a t i v e n n , g a n t e s a a ) l a g i g p t a ari s ta n g e v o d e l ñ o s d e e d s u n i o (P 0 0 0 a m á s l o . 0 5 o i v v i s v a s e r d e c s e r a a l ej e m p
¿Cómo se relaciona con mi vida diaria? Los niños podrán darse cuenta de que los seres vivos (en este caso las plantas) pasan por un proceso de crecimiento y que el crecimiento en los árboles aunque no es tan evidente como en los humanos y algunos animales, existe. Recomendaciones para su aplicación en grupo Ø Realizar una búsqueda de ramas donde se observen los anillos de crecimiento. Se recomiendan ramas de
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Manual de Experimentos para Preescolar
LA SUSTANCIA X ¿Qué neces necesito? ito?
Un vasos desechable. Aceite. Agua. Alcohol. Trozos de madera. Pedacitos de aluminio. Popotes.
¿Cómo se hace?
1. Llen Llenaa ha hast staa un unaa cu cuar arta ta pa parte rtede de un va vaso soco conn ag agua, ua, cui cuida da qu quee el elag agua ua re resb sbal ales espo porr la lass pa pare rede dess de dell va vaso so.. 2. En el mismo vaso, llena una cuarta parte con aceite y una cuarta parte parte con alcohol. Observa Observa que el aceitesecolocaporencimadelaguayelalcoholencimadelaceite. 3. Si quieres hacer tu experimento experimento más atractivo atractivo añade algunos algunos cuerpos sólidos. sólidos. Toma un trozo de papel aluminio y colócalo con cuidado sobre el alcohol. Observa como el aluminio baja lentamente hastadetenerseenlamiel. 4. Añade un pedacito de popote ¿dónde se detiene?, agrega un pedazo de madera en ¿Cuál líquido se detiene?
a a n c i a S u s t
t e t A c e i
a a m e d i d a d d i D e n s / m ) ( k g
9 2 0 7 8 5 0
¿Qué significa?
Ladensidadesunamanerademedircuantamateria(masa)hay deunasustanciaenunespaciodeterminado(volumen). Enloslíquidosladensidadesdiferenteyunasustanciamenos dens de nsaa si siem empr pree es esta tará rápo porr en enci cima ma de dela la su sust stan anci ciaa má máss de dens nsa. a.
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Manual de Experimentos para Preescolar
ELEVADOR ¿Qué neces necesito? ito? • • •
!
•
!
Dosglobosredondosde23cm. Tijeras. Unaregla. Hilo. ¿Cómo se hace?
1. Inflalosglobosyprocuraquetenganelmismotamaño. 2. Co Corta rtado doss pe peda dazo zoss de dehil hiloo de de30 30 cm cmap apro roxi xima mada dame ment nte. e. 3. Amarraunextremodecadahiloacadaglobo. 4. Pega el extremo libre de cada hilo al borde de una mesa, de manera que los globos cuelguen a la misma altura y estén separados entre si por 15cm. aproximadamente. 5. Sopla tan fuerte como puedas puedas entre los globos. globos. Observa que los globos se moverán unohaciaelotro.
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Manual de Experimentos para Preescolar
EL AGUA SE PUEDE CONVERTIR EN ¿Qué necesito? !
!
• •
!
!
!
!
!
!
• • • • •
Un popote cortado medida 1 cm. Cinta adhesiva transparente Agua Tijeras Un libro Una regla Un gotero
¿Cómo se hace?
1. Co Cort rtaa un unse segm gmen ento tode dell po popo pote tede deun unce cent ntím ímet etro rode delo long ngit itud ud.. 2. Co Cort rtaa un unpe peda dazo zo de dela la ci cint ntaa ad adhe hesi siva va y en enun un ex extr trem emoo pe pega ga elpopotedeformavertical. 3. Co Colo loca cala la ci cint ntaa ad adhe hesi siva vaju junt ntoo co conn el elpe peda daci cito to de depo popo pote te sobre una letra de una de las páginas del libro, en estas condiciones, con ayuda del popote, hasta que se forme un mecanismoquesobresalga. 4. Col Coloca oca con con un un goter goteroo una una gota gota de de agua agua dent dentro ro del del pedazodepopote. 5. Ubica tu mirada encima del del menisco de agua cuando cuando esté una letra letra debajo de la cinta y desplaza este dispositivo hacia arriba y abajo, hasta que quedeenfocadalaletra¿sevemayoromenor? Yo observé por 6. Al obs observ ervar ar la let letra ra con el ped pedaci acito to de pop popote ote lle lleno no de agu agua, a, el primera vez
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Manual de Experimentos para Preescolar
EL SONIDO DE LA GALLINA
Pero yo soy un gallo ¿eh?
¿Qué neces necesito? ito? • • • •
Dos metros de hilo cáñamo. Un vaso de plástico o de unicel. Un palillo. Un clavo.
¿Cómo se hace?
1. Enel En elfo fond ndoo de dell va vaso soen enel elce cent ntro rore real aliz izaa un unor orif ific icio ioco conn el elcl clav avo. o. 2. Pasa el hilo por el orificio y amarra amarra la mitad del palillo a un extremo del hilo (el extremo que se encuentradentrodelvaso). 3. Ja Jala lael elot otro roex extr trem emoo de dell hi hilo lo,, de dema mane nera raqu quee el elpa palililllloo qu qued edee ap apoy oyad adoo en enel elfo fond ndoo de dell va vaso so.. 4. Con Con un unaa ma mano no so sost stén én el va vaso so y co conn la ot otra ra to toma ma en entr tree tu tuss de dedo doss el hi hilo lo y ap apre retá tánd ndol oloo de desl sliz izaa tu tuss dedossobreelhilo. 5. Según el modo como deslices los dedos por el hilo, ¿puedes producir sonidos semejantes semejantes a los deunagallina?
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Manual de Experimentos para Preescolar
Información adicional:
El sonido es una onda de presión que se transmite en un medio elástico como el aire, el agua o los sólidos como el suelo. Si un objeto vibra, su movimiento se transmite a las moléculas de aire que están cerca de él. Al moverse estas moléculas en el instante se crea una región donde la presión del aire es más alta. Como las partículas de aire comunican su movimiento a las que están junto a ellas, esta zona de mayor presión (o de compresión) avanza un poco y así sucesivamente.
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Manual de Experimentos para Preescolar
LA FUGA DEL AGUA ¿Qué neces necesito? ito?
Dospedazosdetoalladepapel. Untazón. Unvasodevidrio. Agua.
¿Cómo se hace?
1. 2. 3. 4.
Con doss pe Condo peda dazo zoss de depa pape pell re real aliz izaa un unaa me mech cha, a,re reto torc rcié iénd ndol olos osco como mo se semu mues estr traa en enel eldib dibuj ujo. o. Enel En elva vaso soco colo loca caag agua uaha hast staa llllen enar arun unpo poco comá máss de dela lami mita tadd de dell va vaso so.. Coloc Col ocaa el elva vaso so co conn ag agua ua ju junt ntoo al alta tazó zónn e in intr trod oduc ucee la lame mech chaa que quehi hici cist stee co conn la lass to toal alla lass de depa pape pel.l. Enun En unos osmi minu nuto toss ob obse serv rvaa qu quéé es eslo loqu quee pa pasa saco conn el elag agua ua..
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Manual de Experimentos para Preescolar
El fenómeno de adhesión también se observa en las plantas. Al subir agua por el tallo de la planta, las células que componen el tallo (llamados capilares), tienen un diámetro tan pequeño que facilita la adhesióndelasmoléculasdeaguaadichascélulas,aesteprocesoseleconocecomoaccióncapilar,entre másreducidoeselespaciodelosporosdelsólido(enestecasoloscapilares)subemáselagua.
¿Cómo se relaciona con mi vida diaria?
En la vida diaria podemos observar este fenómeno en varias var ias sit situac uacion iones, es, por eje ejempl mploo cua cuando ndo tir tiramo amoss la
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Manual de Experimentos para Preescolar
¿CÓMO SE DISUELVEN LAS SUSTANCIAS? ¿C ó óm
¿Qué necesit o? !
!
!
•
•
Dos v asos o recipientes transparentes.
Dos cucharaditas de café. Agua frí a y agua cali t
•
o s e hac e 1. O r ? r g ga ni z za equ i ip os d e t r r aba j joo, r epar t cad a equ i ip o t e el mat er i i y r eali z al a z a a l g u u n as pr eg u ¿alg u u na v ez le ha un t as, por e j n pu est o caf emplo: é a u n v aso c ¿a u n v aso co on ag u n leche le ha ua ?, n pu est o u na d e chocolat e c u c har ad i it ?, ¿qu é su ced t a i ió ó ? 2. C oloca en u no d e los v a sos, ag u u a f r d os t er ci os d rí í a hast a lleg el mi smo. E n ar a e l ot r cali ent e en i r o v aso colo l
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Manual de Experimentos para Preescolar
LA LENGUA SE ORGANIZA LA LENGUA SE ORGANIZA ¿Qué neces necesito? ito? · · · · · · · ·
Un poco de agua. Vinagre. Una hoja de papel. Sal. Azúcar en polvo. Café molido. Una servilleta de papel. Un gotero.
c a r ú z A
Café
r e g n a V i
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Manual de Experimentos para Preescolar
e b r o r a r i a ? i e d c l a e v i d t ie ne e n m i g u n a u o a l g q c o a a d n m a r o b i o o a c l a a f e s l a H a s p r g a a l o o s s e r e s ¿ e o r a o c m o b ó e a b l l s l ¿ C u o s c he e n t r l o
a le f ic a f ucede d o l a s n a o s a l é u s u Ide n t i e r l o o o C q i v ? o r o e r oc s o s n s t o r a a i m u l s u p g m g u s t o s n de c o n u n u d n o n e a c n s o he v o s, m a m i n m p u l s m n o y t ie a l o i s ve z lec e s g u s t a t i v o c f r r c i f á e n e s q ue t o s b s t e a e p d s e e o ú c re o s o y t L a lec h ue e l ce re b r pe l i i g ¡ L r “ g . o r b q ce re n a ve z l s a b o r c o m o U ” ” ! o ñ e
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Manual de Experimentos para Preescolar
EL GLOBO MÁGICO t o ? esi t ¿ Q ué ne c · · · ·
l no. 7. Un globo de lás tico. p e d a l l e t o Una b inagre. 1 0 0 ml. de v to de sodio. a n o b r a c i b e 2 0 gramos d
h a c e ? e s o globo. l m e ó d C o ¿ r t n e d icarbona to b l e a . c o l o 1 C n la bo tella
ue ocurando q
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Manual de Experimentos para Preescolar
NUESTRA CÁMARA OSCURA ¿Qué necesit necesito? o?
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Manual de Experimentos para Preescolar
¿CÓMO SE FORMAN LAS NUBES?
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Manual de Experimentos para Preescolar
EL ÁGUILA TIENE CALOR
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Manual de Experimentos para Preescolar
LAS GRASAS ¿Qué necesito?
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